One major use case is to allow internet access for some specific sites for all users without authentication. Normally, in our environment, before you go to the internet, we need to grant internet access to your account.
Another use case is where there are some sites that people can go through only from inside the office, but they should not authenticate. We don't want to grant them internet access, but we want them to be able to go to the site. We could easily configure those sites, and the users do not require authentication for them.
We also used it to block or restrict some sites during the day so that these sites are not able to affect people during their work hours. We were also able to exempt some users from any restriction. People with the manager and higher roles could go to the internet, whereas the access was restricted for people who were not managers.